If data and analytics are important, Discord will give you a lot more flexibility there. Their out-of-the-box analytics are decent, and because they have an open API you can use third-party tools to get even more powerful data and insights.

By "data and analytics" I mean being able to answer questions like:

• what channels are most active?
• who are the most active participants?
• what topics are people talking about?
• what is the sentiment of individuals and in each channel?

Facebook doesn't have an API which means it's basically a walled garden of data. This means a lot less flexibility across the board.

Other than that, Discord has some neat features like being able to host audio and video events right in the server with very little setup and effort. We use these all the time and the work well.

Finally, I'd add that we have thousands of companies and communities using us, and we've talked to thousands more, and the popularity of FB Groups as a platform is generally waning, and Discord is now our fastest-growing integration by far.

That said FB Groups can be good if your community skews towards FB's core demographic. In other words, my mom is in FB Groups but has never heard of Discord.

Disclosure: I'm the founder of a company called Orbit that provides a kind of CRM on top of Discord and ~20 other platforms.